Subclinical paraganglioma of the retroperitoneum: A case report

Figure 1 Abdominal computed tomography and magnetic resonance imaging show a 6. 5 cm × 4.5 cm cystic solid mass in the left upper abdomen with heterogeneous density and mild enhancement in the arterial phase. A: Computed tomography (CT) plain scan period; B: CT arterial phase; C: CT venous phase; D: Magnetic resonance imaging (MRI) plain scan period; E: MRI arterial phase; F: MRI venous phase.

Figure 2 Gross features and pathologic characteristics of the resected tumor. A: Gross features of the tumor; B: Tumor hematoxylin and eosin staining (× 400); C: Cluster of differentiation 56 positive (× 400); D: Chromogranin positive (× 400); E: Synaptophysin positive (× 400); F: Soluble protein-100 positive (× 400); G: Insulinoma-associated protein 1 positive (× 400); H: Succinate dehydrogenase type B positive (× 400).